Memprof : Refactor [run_callback_exn] so that it also stores the value returned by the callback.
Memprof : Refactor [run_callback_exn] so that it also stores the value returned by the callback.

gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml